When you're friends with someone in one of your classes, but outside of that class they treat you like a stranger.
"She and I have such a classroom friendship. When I say hey at lunch, she acts like she doesn't know me, even though we were cracking up during a World History lecture an hour ago."
Virus that infects twelve-year-olds and causes them to act older than they really are, have more relationships than most highschoolers, overuse the word 'swag', disrespect women, post idiotic Facebook statuses, and just in general make people lose all faith in humanity. Though it's mostly twelve-year-olds who contract it, not all of them have it, and older/younger people can also get it.
Guy 1: "I saw your little brother's Facebook status last night, apparently he banged 30 hoes at his friend's party."
Guy 2: "WTF?!"
*Guy 1's Little Brother's Status Updates:
"Banged 30 hoez at da party last night #swag"
"Skipped pre algabra to pley froot ninja, i hid out in da bafroom #swag"
"The sun aint no star it's a sun #reeltalk"
Guy 2: *facepalms* "I don't believe this."
Guy 1: "Me neither... Maybe he got the Twelviloma Virus?"
Something you can say to yourself when you get a really sucky test score; basically the school version of "carpe diem" or "shit happens". Can't go to college or get a cool job? There's always bumming out at the airport - it's indoors, there's a bathroom, and there are restaurants you can work at so you don't have to beg! :P
Guy 1: "What'd you get on your test?"
Guy 2: "D plus."
Guy 1: "I got an F."
Both: "Oh well... Airport bum swag!"
Someone who spends way too much time at McDonald's, and not even to eat anything.
"She's turning into a real McBum because of that sexy waiter."
"My little brother can spend hours at McDonald's just staring at the Happy Meal toys on display. He's such a McBum."